(<= item1 item2 ...)

The first is less than or equal to the others.

This function is the less-than or equal-to operator:

If item1 is less than or equal to item2, this function returns a T (true).
If item1 is greater than item2, this function returns nil (false).

If this function contains more than two items, the function returns T when each item to the right is less-than or equal to the item on its left. The items can be numbers or strings.

Examples

This expression	Returns
(<= 8 12)	T
(<= 7 16 16)	T
(<= 7)	T
(<= "x" "x" "z")	T
(<= "x" "y" "x")	nil

NOTE This function is the opposite of the > (Greater Than operator) function.

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(cond (statement1 result1 ...) ...)

(if test statement1 [statement2])

(while text statement …)

LISP Compatibility

Programming Overview of LISP (LISt Processing) Language